U.S. patent number 10,422,471 [Application Number 15/090,469] was granted by the patent office on 2019-09-24 for magnetic hanging device.
This patent grant is currently assigned to D. R. BIKE LTD.. The grantee listed for this patent is D.R. BIKE LTD.. Invention is credited to David Reingewirtz.
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United States Patent |
10,422,471 |
Reingewirtz |
September 24, 2019 |
Magnetic hanging device
Abstract
A magnetic hanging device for use in combination with a
magnetically attractive surface. The device includes: a magnetic
hanger comprising a magnetic sheet and a magnetic-sheet
reinforcement suspending layer having a rear side to which the
magnetic sheet is fixed and a front side having a hanging member
attached thereto; and a plurality of spaced apart ribs disposed on
the front side of the hanger, at least one of the ribs being a
single-piece non-segmented rib. The hanger is configured in
proportion to Young's modulus of elasticity; the length of the
ribs; the cube of the thickness of the reinforcement suspending
layer; and indirectly proportional to the average distance between
the ribs.
Inventors: |
Reingewirtz; David (Ramat
Hasharon, IL) |
Applicant: |
Name |
City |
State |
Country |
Type |
D.R. BIKE LTD. |
Ramat Hasharo |
N/A |
IL |
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Assignee: |
D. R. BIKE LTD. (Ramat
Hasharon, IL)
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Family
ID: |
45567424 |
Appl.
No.: |
15/090,469 |
Filed: |
April 4, 2016 |
Prior Publication Data
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Document
Identifier |
Publication Date |
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US 20160215925 A1 |
Jul 28, 2016 |
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Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
Issue Date |
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13763939 |
Feb 11, 2013 |
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PCT/IL2011/000652 |
Aug 10, 2011 |
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61344512 |
Aug 12, 2010 |
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Current U.S.
Class: |
1/1 |
Current CPC
Class: |
A47B
97/001 (20130101); H01F 7/0215 (20130101); H01F
7/0252 (20130101); A47G 1/17 (20130101); F16B
1/00 (20130101); F16M 13/022 (20130101); F16B
2001/0035 (20130101); Y10T 428/24669 (20150115); H01F
1/117 (20130101); Y10T 29/4995 (20150115) |
Current International
Class: |
B32B
3/30 (20060101); A47B 97/00 (20060101); F16B
1/00 (20060101); H01F 7/02 (20060101); A47G
1/17 (20060101); F16M 13/02 (20060101); H01F
1/117 (20060101) |
Field of
Search: |
;428/99,114,119,120,121,122,130,156,157,163,164,167 |
References Cited
[Referenced By]
U.S. Patent Documents
Foreign Patent Documents
Primary Examiner: Gaitonde; Megha M
Attorney, Agent or Firm: Torche; Mark David Patwrite Law
Parent Case Text
CROSS REFERENCE TO RELATED APPLICATIONS
This application is a Continuation-in-Part of U.S. application Ser.
No. 13/763,939 entitled "Suspending Device" filed on Feb. 11, 2013,
which is a Continuation-In-Part of International Patent Application
No. PCT/IL2011/000,652, filed on Aug. 10, 2011, and claims priority
from U.S. Provisional Patent Application No. 61/344,512, filed on
Aug. 12, 2010, which applications are hereby incorporated by
reference in their entirety.
Claims
What is claimed is:
1. A magnetic hanging device for use in combination with a
magnetically attractive surface, the device comprising: a magnetic
hanger comprising a magnetic sheet disposed at the rear outer face
of the device and configured to directly interface with and
magnetically interact with said magnetically attractive surface; a
magnetic-sheet reinforcement layer having a rear side to which the
magnetic sheet is fixed; a plurality of rigid and spaced apart
stiffening ribs disposed on and protruding from said front side of
the magnetic hanger so that the stiffening ribs have an exposed or
free edge, at least one of the stiffening ribs being a single-piece
non-segmented stiffening rib and at least one of the stiffening
ribs comprises a cut-out from which an object may be hung; and a
pull flap, wherein the magnetic-sheet reinforcement suspending
layer must be configured in accordance with the following equation:
##EQU00003## wherein: E is Young's modulus of elasticity, in giga
Pascals; L=the length of the ribs in centimeters; t=the thickness
of the reinforcement suspending layer that is the portion between
the ribs, in tenths of millimeters; and D=the average distance
between the ribs, in centimeters; and the resulting numerical value
of the equation is in the range of 1,800 to 60,000, wherein the
magnetic hanging device bends rather than peels from the
magnetically attractive surface whereby the magnetic hanging device
is configured to allow it to hang objects while at the same time
the magnetic hanging device can be removed and disengaged from said
magnetically attractive surface by an initial pulling on said pull
flap away from the magnetized surface.
2. The device of claim 1, capable of use with a non-flat
magnetically attractive surface.
3. The device of claim 1, wherein at least one of the stiffening
ribs comprises a longitudinal fold.
4. The device of claim 1, wherein the hanger has top and bottom
edges and the stiffening ribs extend to at least one of said
edges.
5. The device of claim 1, wherein the stiffening ribs are spaced
apart by a distance greater than the width of the stiffening
ribs.
6. The device of claim 1, wherein the hanger has right and left
side edges and all of the stiffening ribs are parallel to at least
one of said edges.
7. The device of claim 1, wherein the stiffening ribs are parallel
to each other.
8. The device of claim 1, wherein the ribs are not all parallel to
each other.
9. The device of claim 1, wherein the ribs are flared out with
respect to each other.
10. The device of claim 1, wherein the stiffening ribs are
diagonally arranged along a path with respect to the hanger.
11. The device of claim 1, wherein all of the ribs are vertically
oriented.
12. A method of removing a magnetic hanging device that is
configured for use in combination with a magnetically attractive
surface, the method comprising: (a) obtaining a magnetic hanger
that comprises: a magnetic sheet disposed at the rear outer face of
the device and configured to directly interface with and
magnetically interact with said magnetically attractive surface; a
magnetic-sheet reinforcement layer having a rear side to which the
magnetic sheet is fixed; a plurality of rigid spaced apart
stiffening ribs disposed on and protruding from said front side of
the magnetic hanger so that the stiffening ribs have an exposed or
free edge, at least one of the stiffening ribs being a single-piece
non-segmented stiffening rib and at least one of the stiffening
ribs comprises a cut-out from which an object may be hung; and a
pull flap, and wherein the magnetic-sheet reinforcement suspending
layer must be configured in accordance with the following equation:
##EQU00004## wherein: E is Young's modulus of elasticity, in giga
Pascals; L=the length of the ribs in centimeters; t=the thickness
of the reinforcement suspending layer that is the portion between
the ribs, in tenths of millimeters; and D=the average distance
between the ribs, in centimeters; and the resulting numerical value
of the equation is in the range of 1,800 to 60,000, whereby the
magnetic hanging device is configured to allow it to hang objects
while at the same time the magnetic hanging device can be removed
and disengaged from said magnetically attractive surface; and (b)
pulling on said pull flap away from the magnetized surface so that
the magnetic hanging device bends, rather than peels, from the
magnetically attractive surface so as to disengage the magnetic
hanging device from the magnetically attractive surface.
Description
FIELD OF THE INVENTION
The present invention relates to devices for hanging pictures,
shelves or the like and, more specifically, to a magnetic
suspending device.
BACKGROUND OF THE INVENTION
Flexible permanent magnetic materials are often supplied in the
form of sheets or rolls and have been commercially available for
many years. These materials are typically prepared by mixing a
powdered ferrite material with a suitable polymeric or plastic
binder into a uniform mixture. The polymeric materials are often
elastomers, and the process is therefore typically accomplished
through the use of sheet extrusion or calendering. The mixture is
converted into strip or sheet form, providing a permanent stable
product that is usually somewhat flexible, and that can readily be
handled and made into elements of any desired shape by cutting
and/or stamping.
The magnetic material is permanently magnetized so that the
resulting elements can act individually as permanent magnets, the
magnetic field being of sufficient strength that they will adhere
to a magnetically attracted material, such as an iron or steel
sheet. Many magnetic materials and the resultant sheet materials
are typically inherently dark in color and it is therefore usual to
attach these magnets to a printable substrate such as paper or
plastic by gluing. A decorative pattern and/or other information
may be printed on that paper or plastic. A popular application of
such materials is thin, flat magnets having on their outer surface
a decorative pattern and/or promotional information, including
advertisements in direct mailings, newspaper inserts, and so forth,
box toppers, coupons, business cards, calendars, greeting cards,
postcards, and so forth.
A minimal force, Fmin, of attractive interaction between a
magnetizable plate and a magnetic member is defined by the
following expression: Fmin>FgKfr (equation 1)
where Fg is a force applied to the magnetic member by the hanged
object due to gravity; Kfr is a coefficient of friction between the
magnetizable plate and the magnetic member.
The force of magnetic attraction between two substantially flat
bodies where one of them is a flat permanent magnet and another is
a plate made of a magnetizable material depends on the following
parameters: (a) magnetic moment per unit volume of the magnet; (b)
magnet volume; (c) magnetization value of the magnetizable
material; and (d) contact area between the magnet and magnetizable
member.
The force Fmin is proportional to each abovementioned
parameters.
It is believed that the technology relevant to the present
invention is disclosed in: U.S. Pat. No. 3,987,567 (Fritts, 1976
Oct. 16): US 2003/106,913 (Kohno, 2003 Jun. 12); US 2008/087,785
(Roche, 2008 Apr. 7); and JP 2005/218,487 (Ogushi, 2010 Aug. 18),
all of which are incorporated herein by reference.
SUMMARY OF THE INVENTION
The present invention provides a device that allows for convenient
fixing of a picture, shelf, television, guitar or the like, at
least temporarily (i.e. removably) on a magnetic surface.
In accordance with embodiments of one aspect of the present
invention there is provided a magnetic hanging device for use in
combination with a magnetically attractive surface. The device
includes: a magnetic hanger comprising a magnetic sheet and a
magnetic-sheet reinforcement suspending layer having a rear side to
which the magnetic sheet is fixed and a front side having a hanging
member attached thereto; and a plurality of substantially rigid
spaced apart ribs disposed on the front side of the hanger, at
least one of the ribs being a single-piece non-segmented rib. The
hanger is configured in accordance with the following equation:
##EQU00001## wherein E is Young's modulus of elasticity, in giga
Pascals; L=the length of the ribs in centimeters; t=the thickness
of the reinforcement suspending layer, in tenths of millimeters;
and D=the average distance between the ribs, in centimeters; and,
with the resulting numerical value of the equation is in the range
of 1,800 to 60,000.
In some embodiments, the resulting numerical value of the equation
is in the range of 5,000 to 40,000. In some embodiments, the
resulting numerical value of the equation is in the range of 16,000
to 32,000.
In some embodiments, the device is configured for use with a
non-flat magnetically attractive surface.
In some embodiments, at least one of the ribs is formed by a
longitudinal fold. In some embodiments, the ribs are spaced apart
by a distance greater than the width of the ribs. In some
embodiments, the hanger has top and bottom edges and the ribs
extend to at least one of said edges. In some embodiments, the
hanger has right and left side edges and the ribs are parallel to
at least one of said edges. In some embodiments, the ribs are
parallel to each other. In some embodiments, at least some of the
ribs are not all parallel to each other. In some embodiments, the
ribs are flared out with respect to each other. In some
embodiments, the ribs are diagonally arranged a long a path with
respect to the hanger.
In some embodiments, at least one of the ribs has a cutout
configured so that an object can be hung therefrom. In some
embodiments, the device further includes one or more pull
flaps.
It is a particular feature of the present magnetic hanging device
that it can relatively easily be removed/disengaged from a
magnetized surface by an initial separation of a corner or edge of
the device from the magnetized surface after which the device
readily detaches from the surface. Without limitation to theory, it
is believed that a combination of the material properties and
configuration of the device allow for the aforementioned ease in
detachment, which includes: Young's modulus of elasticity; material
thickness; rib length; and rib spacing.
Again, without limitation to actual operation, the readily
removable hanging device is, in some embodiments, configured so
that it is removed in a "popping" manner once an appropriate
portion of a corner or edge of the device is separated from the
magnetically attractive surface, which is in contrast to a peeling
type of removal. This "popping" is a result of the extremely lower
force required once a corner or edge is disengaged. In this regard,
removal of the device occurs upon a bending thereof rather than
peeling.
One advantage of the present device is the possibility of a
significant increase in the load that can be carried or hung, yet
with relative ease of removal of the device from the magnetically
attractive surface.
Another advantage is that use of the device in combination with a
magnetically attractive surface, the location of the object to be
hung/supported can be conveniently changed, and without any actions
such as removing a nail or screw and re-nailing/re-screwing.
Thus, the present invention provides a magnetic hanging device that
is configured to hang/support objects, including relatively heavy
objects, while being flexible in location and being relatively easy
to separate from the magnetically attractive surface. Furthermore
the hanging device does not require fasteners such as nails, screw
bolts or hooks, which in some cases may only be good for one-time
use and that may require locating a stud in a wall (which may limit
the hanging location); does not require drilling and resultant
noise and dust; and is without the worry of weakening of the
connection over time, which often causes shelves or pictures to
fall. Also, if one wishes to remove a shelf/picture, there is no
fastener or hole remaining in the wall or surface.
BRIEF DESCRIPTION OF THE DRAWINGS
The present invention will be understood and appreciated more fully
from the following detailed description taken in conjunction with
the appended drawings in which:
FIG. 1A is a perspective view of a magnetically attractive surface
attached to a surface of interest such as a wall;
FIG. 1B is a perspective view of an embodiment of a magnetic
hanging device of the present invention, usable in combination
with, for example, the magnetically attractive surface illustrated
in FIG. 1;
FIG. 2A is a perspective view of an embodiment of the magnetic
hanging device attached to a magnetically attractive surface;
FIG. 2B is a perspective view of an embodiment of the magnetic
hanging device illustrating an initial step of disengagement from
the magnetically attractive surface;
FIG. 3 is a perspective view of a magnetic hanging device of the
device, including pull-flaps;
FIGS. 4A and 4B are respective perspective and cross-sectional
views of the magnetically attractive surface underlain by a
mesh;
FIG. 5 is a perspective view of an embodiment of the magnetic
hanging device with longitudinal folds;
FIG. 6 is a perspective view of an embodiment of the magnetic
hanging device including vertically arranged stiffening ribs;
FIG. 7 is a perspective view of an embodiment of the magnetic
hanging device with stiffening ribs in a flared arrangement;
FIG. 8 is a front view of an embodiment of the magnetic hanging
device with stiffening ribs arranged along a diagonal path; and
FIG. 9 is a perspective view of another embodiment of the magnetic
hanging device.
The following detailed description of embodiments of the invention
refers to the accompanying drawings referred to above. Dimensions
of components and features shown in the figures are chosen for
convenience or clarity of presentation and are not necessarily
shown to scale. Wherever possible, the same reference numbers will
be used throughout the drawings and the following description to
refer to the same and like parts.
DETAILED DESCRIPTION OF THE INVENTION
The following detailed description of embodiments of the invention
may refer to the accompanying drawings. Embodiments and/or
limitations featured in the figures are chosen for convenience or
clarity of presentation and are not meant to limit the scope of the
invention.
Illustrative embodiments of the invention are described below. In
the interest of clarity, not all features/components of an actual
implementation are necessarily described.
FIG. 1A shows a magnetically attractive surface 120 (e.g. including
any or a combination of iron, nickel, cobalt or manganese) that is
mechanically fixed to a surface of interest 150, e.g. a room wall.
Any surface including a curved surface situated at any angle
relative to gravity direction is in the scope of the current
invention.
FIG. 1B shows an embodiment of a somewhat flexible magnetic hanger
110 provided with a hanging element 140 configured so that a load
such as an artwork piece, wall clock, book shelf, ledge, night
stand and so on (not shown) can be hung therefrom or supported
thereby. The magnetic hanger 110 includes a somewhat flexible
permanent magnet, typically prepared by mixing a powdered ferrite,
neodymium or NdFeB material with a suitable polymeric or plastic
binder into a uniform mixture. The mixture is converted into sheet
form by extrusion or calendering.
FIG. 2A shows magnetic hanger 110 placed on magnetically attractive
surface 120 mechanically connected to the surface of interest 150,
which in some embodiments, constitute together the hanging device
100. When placed adjacent to magnetically attractive surface 120,
the magnetic hanger 110 is magnetically fixed on the magnetizable
surface 120 due to the force of magnetic attraction. As noted
above, this force is proportional to a volume of the magnetic
hanger 110 and the contact area. Thus, the carried load can be
increased by means of sheet thickening and extension of the contact
area.
FIG. 2B shows the magnetic hanger 110 at the initial step of
disengagement from magnetically attractive surface 120, wherein an
edge 115 of the hanger 110 has been slightly disengaged from the
surface 120. Typically, due to properties of the hanger 110, once
this initial disengagement has been accomplished, the hanging
device will readily disengage from the magnetically attractive
surface 120. The aforementioned properties, which may be one of or
a combination of mechanical properties; device dimensions; and
associated stiffening ribs including spacing, length, width and
thickness of such ribs, will be discussed below.
FIG. 3 shows an embodiment of hanging device 100 for permanently or
temporarily suspending an object of interest. The magnetic hanger
110 includes pull flaps 160 that can be used to assist in pulling
magnetic hanger 110 off of surface 120. Non-magnetic flaps 160 may
be used. A plate 185 is provided with mortise-like ribs 180, which
can be configured to provide a receiving portion for hanging
element 140 and/or add strength to the hanging device; or even be
configured so that an object can be directly hung therefrom.
FIGS. 4A and 4B show magnetically attractive surface 120 attached
to the surface of interest 150 wherein magnetically attractive
surface 120 is underlain by a mesh 170, which may include a filler.
In FIG. 4B, mesh 170 is a filled mesh 170, which is flush with the
surface of interest 150.
FIG. 5 shows an embodiment of hanging device 100 wherein the
flexible magnetic hanger 110 is provided with stiffening ribs 130
in the form of longitudinal folds, typically vertical, as shown,
for additional strength in the direction parallel to the ribs, i.e.
vertical in this case, which is typical. Rib 130 in the center, is
illustrated with a hook/hanging mechanism constituted by an angled
cut-out 190 at the top of a rib, from which an object of interest
may be hung. It should be noted that, mutatis mutandis, the instant
magnetic hanging device can be used to hang or support items such
as book shelves and the like. In such case, the device may
additionally or alternatively include a shelf supporting projection
rather than a hook-like mechanism.
FIG. 6 shows the magnetic hanger 110 wherein stiffening ribs 130
are solid ribs attached to the hanger, although the ribs could be
integrally formed. Ribs 130 are parallel and spaced apart, and have
a width W, which is narrower than the distance D between the ribs.
The hanger 110 thus is reinforced to be considerably stiff and
strong in the direction of ribs 130, yet still has some flexibility
in the direction perpendicular to, or substantially perpendicular
to, the ribs. As such, the device can be disengaged from
magnetically attractive surface 120 by pulling generally at the
location and direction of arrow A1.
FIG. 7 shows an embodiment of the device where ribs 130 are not
parallel to each other, rather in a flaring pattern, and also do
not extend the entire dimension of the hanger 110. Ribs 130 flare
out in a generally arc-like path 200. Further, ribs 130 are
exemplified as generally rod-shaped ribs. For the most part, ribs
130 have a width smaller than the space between them.
FIG. 8 shows an embodiment of the device where ribs 130 are also
not parallel to each other, do not extend the entire dimension of
the hanger 110 and flare in two directions along a generally
diagonal path 220. As such, the device can be removed from
generally any direction, however, if ribs 130 were to extend mostly
or all the way to the edges of the hanger 110, with the exemplary
path 220 shown, the device would be designed to be pulled from
either the lower right corner or upper left corner thereof, i.e.
From a location generally most adjacent to one of the ends of path
220.
In some embodiments, ribs 130 can be in the form of elongated
L-shaped brackets (not shown).
FIG. 9 shows an embodiment where magnetic hanger 110 includes a
magnetic sheet 230, typically rather flexible; and a generally
sturdy magnetic-sheet reinforcement suspending layer 240, typically
made of metal (e.g. steel, aluminum, etc.), a composite material or
a sturdy plastic. Suspending layer 240 includes a hanging member
such as hanging element 140, rib cut-out 190, a hook or any other
appropriate member from which an object can be hung or by which an
object can be supported.
With reference still to FIG. 9, in some embodiments, it is a
particular feature of the hanging device that hanger 110 has
properties (is designed) in accordance with the following
equation:
##EQU00002##
Wherein E is Young's modulus of elasticity, in giga Pascals; L=the
length of the ribs 130 in centimeters; t=the thickness of the
hanger 110, (specifically the portion between the ribs 130, i.e.
not including the rib thickness), in tenths of millimeters; and
D=the average distance between the ribs 130, in centimeters. And,
with the aforementioned units, the resulting numerical value of the
equation is in the range of 1,800 to 60,000 and in some embodiments
in the range 5,000 to 40,000 and in some embodiments within the
range 16,000 to 32,000.
It may be considered that for practical purposes, where the device
is designed in a manner generally in accordance with FIG. 9, i.e.
with a magnetic sheet 230 backed by a reinforcing sheet 240
(typically but not limited to metal or plastic, typically a stiff
plastic), the strength of the magnetic sheet is typically
negligible, relatively.
It should be noted that ribs 130 are preferably and typically each
configured as unitary single-piece elements, i.e. not as a series
of elements arranged end to end to constitute the full length of
the rib, rather each is a one-piece rib. It should be clear that if
a rib were formed by a plurality of segments, that rib would not
provide the same stiffening as a single-piece rib as any space
between the segments would provide a possible bend point.
It should be understood that the above description is merely
exemplary and that there are various embodiments of the present
invention that may be devised, mutatis mutandis, and that the
features described in the above-described embodiments, and those
not described herein, may be used separately or in any suitable
combination; and the invention can be devised in accordance with
embodiments not necessarily described above.
* * * * *